A Study on the Characteristics of Microwave Transmission Lines Having Defected Ground Structures and Lumped Elements

결함접지구조와 집중소자를 지닌 초고주파 전송선로의 전기적 특성 연구

  • 임종식 (순천향대학교 정보기술공학부) ;
  • 배주석 (순천향대학교 정보기술공학부) ;
  • 최관순 (순천향대학교 정보기술공학부) ;
  • 안달 (순천향대학교 정보기술공학부)
  • Published : 2006.08.01


In this paper, the transfer characteristics of high frequency transmission line having defected ground structure (DGS) and lumped elements are described. When a DGS, which is a kind of periodic structure, is inserted into a transmission line, its equivalent inductance and capacitance elements are added to the characteristics of the standard transmission line. This generates resonance, 3dB cut-off frequency, low-pass, band rejection, and band pass characteristics, and causes a slow-wave and enlarged electrical length of the transmission line. In addition, if the DGS is combined by a lumped element such as resistor, capacitor, and inductor, the resonant and cut-off frequencies moves up or down and other changes occur in the transmission characteristics. The variation of the transmission characteristics is described with the qualitative prediction and measured data.


DGS;defected ground structure;transmission line